Originally Posted by
mactec54
I should of explained it better a Left and Right hand Ballscrew is need when using ( 1 ) motor, 2 Ballscrews, here is an engineering post on this subject so nothing silly about it at all, Helical racks also have to have left and right hand which a lot of builder's are now using
Depending on the drive arrangement this could still be done with ( 2 ) right hand Ballscrews with ( 1 ) motor being used like you are saying but with any gearing being used ( 1 ) Ballscrew would be reversed so then would need a Right and Left hand Ballscrew
Why in the world would anyone need a ball screw with a left-handed thread? Why not simply reverse the program and drive the device in the opposite direction? Unfortunately, this may not always be the best solution. Several industrial applications require a left-handed ball screw to help resolve high-precision programming requirements and reduce the number of needed expensive components.
For example, a system designed with two ball screws; one right-handed and the other left-handed, with each unit positioned on either side of one drive motor moving in opposite directions. This configuration is less expensive and much more practical because only one motor is required and there is no need to synchronize two separate right-handed ball screw systems driven with two servo or stepper motors.